Fix double brackets

CHANGES

@@ -13,11 +13,16 @@ Deprecated
 Features added
 --------------
 
+* #10523: HTML Theme: Expose the Docutils's version info tuple as a template
+  variable, ``docutils_version_info``. Patch by Adam Turner.
+
 Bugs fixed
 ----------
 
 * #10509: autosummary: autosummary fails with a shared library
-* #10497: py domain: Failed to resolve strings in Literal
+* #10497: py domain: Failed to resolve strings in Literal. Patch by Adam Turner.
+* #10523: HTML Theme: Fix double brackets on citation references in Docutils 0.18+.
+  Patch by Adam Turner.
 
 Testing
 --------
@@ -29,10 +34,11 @@ Bugs fixed
 ----------
 
 * #10498: gettext: TypeError is raised when sorting warning messages if a node
-  has no line number
-* #10493: html theme: :rst:dir:`topic` directive is rendered incorrectly with
-  docutils-0.18
-* #10495: IndexError is raised for a :rst:role:`kbd` role having a separator
+  has no line number. Patch by Adam Turner.
+* #10493: HTML Theme: :rst:dir:`topic` directive is rendered incorrectly with
+  Docutils 0.18. Patch by Adam Turner.
+* #10495: IndexError is raised for a :rst:role:`kbd` role having a separator.
+  Patch by Adam Turner.
 
 Release 5.0.0 (released May 30, 2022)
 =====================================
@@ -73,6 +79,7 @@ Incompatible changes
 
 * #10474: :confval:`language` does not accept ``None`` as it value.  The default
   value of ``language`` becomes to ``'en'`` now.
+  Patch by Adam Turner and Takeshi KOMIYA.
 
 Deprecated
 ----------
@@ -128,19 +135,20 @@ Features added
   non-imported
 * #10028: Removed internal usages of JavaScript frameworks (jQuery and
   underscore.js) and modernised ``doctools.js`` and ``searchtools.js`` to
-  EMCAScript 2018.
+  EMCAScript 2018. Patch by Adam Turner.
 * #10302: C++, add support for conditional expressions (``?:``).
 * #5157, #10251: Inline code is able to be highlighted via :rst:dir:`role`
   directive
-* #10337: Make sphinx-build faster by caching Publisher object during build
+* #10337: Make sphinx-build faster by caching Publisher object during build.
+  Patch by Adam Turner.
 
 Bugs fixed
 ----------
 
 5.0.0 b1
 
 * #10200: apidoc: Duplicated submodules are shown for modules having both .pyx
-  and .so files
+  and .so files. Patch by Adam Turner and Takeshi KOMIYA.
 * #10279: autodoc: Default values for keyword only arguments in overloaded
   functions are rendered as a string literal
 * #10280: autodoc: :confval:`autodoc_docstring_signature` unexpectedly generates

doc/templating.rst

@@ -383,6 +383,15 @@ in the future.
 
    .. versionadded:: 4.2
 
+.. data:: docutils_version_info
+
+   The version of Docutils used to build represented as a tuple of five elements.
+   For Docutils version 0.16.1 beta 2 this would be `(0, 16, 1, 'beta', 2)``.
+   The fourth element can be one of: ``alpha``, ``beta``, ``candidate``, ``final``.
+   ``final`` always has 0 as the last element.
+
+   .. versionadded:: 5.0.2
+
 .. data:: style
 
    The name of the main stylesheet, as given by the theme or

sphinx/builders/html/__init__.py

@@ -536,6 +536,7 @@ def prepare_writing(self, docnames: Set[str]) -> None:
             'css_files': self.css_files,
             'sphinx_version': __display_version__,
             'sphinx_version_tuple': sphinx_version,
+            'docutils_version_info': docutils.__version_info__[:5],
             'style': self._get_style_filename(),
             'rellinks': rellinks,
             'builder': self.name,

sphinx/themes/basic/static/basic.css_t

@@ -237,6 +237,7 @@ a.headerlink {
     visibility: hidden;
 }
 
+{%- if docutils_version_info[:2] < (0, 18) %}
 a.brackets:before,
 span.brackets > a:before{
     content: "[";
@@ -246,6 +247,7 @@ a.brackets:after,
 span.brackets > a:after {
     content: "]";
 }
+{% endif %}
 
 h1:hover > a.headerlink,
 h2:hover > a.headerlink,